Patent attributes
A flow-regulating valve has at least one active material component that may be passively activated (e.g., in response to changes in surrounding temperature) to control fluid flow through the valve. Additionally, an actuator, which may be of any type, such as a solenoid or even another active material component, actuates due to active activation, such as resistive heating in response to a sensor/control signal, which could be due to external conditions (such as existence of high acceleration) or internal conditions (such as change in fluid temperature) to provide an active level of control of fluid flow through the valve. The flow-regulating valve may be used in an oil level control system of a transmission to ensure adequate oil availability during various operating conditions while minimizing the adverse effects such as spin and windage losses. Similar applications can be made in other fluid flow or fluid level control systems.
